Moving cities, or relationships, or jobs isn't worth as much if you aren't simultaneously working on yourself
And new sceneries have different people, climate etc. also literally changing people (microbiome for example).
So yes, some people travel to run away from problems they never dare to solve, but some people just like to be on the move, like our nomadic ancestors.
Very different from people who are straining or destroying their relationships to go have some croissants in Paris or whatever.